MetaUsr   struct {
					Etag string `json:"etag"`
				}
			}
		}
		var ei erasureInfo
		var idx int
		if err := json.Unmarshal(meta, &ei); err == nil && ei.V2Obj != nil {
			if m.objSize == 0 {
				m.objSize = ei.V2Obj.Size
			}
			m.data = ei.V2Obj.EcM
			m.parity = ei.V2Obj.EcN
			if len(ei.V2Obj.PartNums) == 1 && !strings.ContainsRune(ei.V2Obj.MetaUsr.Etag, '-') {
				m.wantMD5 = ei.V2Obj.MetaUsr.Etag

      "x-minio-internal-tier-free-versionID": "OWZlZjk5N2QtMjMzZi00N2U3LTlkZmMtNWYxNzc3NzdlZTM2"
    },
    "MetaUsr": {
      "X-Amz-Replication-Status": "COMPLETED",
      "content-type": "application/octet-stream",
      "etag": "8315e643ed6a5d7c9962fc0a8ef9c11f"
    },
...
```

### Metadata for object replication - on target

```
...
  "MetaSys": {
      "x-minio-internal-inline-data": "dHJ1ZQ==",

		parts []CompletePart
	}{
		// inputParts - 0.
		// Case for replicating ETag mismatch.
		{
			[]CompletePart{
				{ETag: "abcd", PartNumber: 1},
			},
		},
		// inputParts - 1.
		// should error out with part too small.
		{
			[]CompletePart{
				{ETag: "e2fc714c4727ee9395f324cd2e7f331f", PartNumber: 1},
				{ETag: "1f7690ebdd9b4caf8fab49ca1757bf27", PartNumber: 2},
			},
		},

    postBodyRetransmittedOnFailureRecovery()
  }

  @Test
  fun cacheHit() {
    server.enqueue(
      MockResponse(
        headers =
          headersOf(
            "ETag",
            "v1",
            "Cache-Control",
            "max-age=60",
            "Vary",
            "Accept-Charset",
          ),
        body = "A",
      ),
    )
    client =

		Name:                       oi.Name,
		Size:                       oi.Size,
		ActualSize:                 asz,
		Bucket:                     oi.Bucket,
		VersionID:                  oi.VersionID,
		ETag:                       oi.ETag,
		ModTime:                    oi.ModTime,
		ReplicationStatus:          oi.ReplicationStatus,
		ReplicationStatusInternal:  oi.ReplicationStatusInternal,
		DeleteMarker:               oi.DeleteMarker,

   *
   * @since 28.2
   */
  public static final String CROSS_ORIGIN_OPENER_POLICY = "Cross-Origin-Opener-Policy";

  /** The HTTP {@code ETag} header field name. */
  public static final String ETAG = "ETag";

  /** The HTTP {@code Expires} header field name. */
  public static final String EXPIRES = "Expires";

  /** The HTTP {@code Last-Modified} header field name. */

type PartTooBig struct{}

func (e PartTooBig) Error() string {
	return "Part size bigger than the allowed limit"
}

// InvalidETag error returned when the etag has changed on disk
type InvalidETag struct{}

func (e InvalidETag) Error() string {
	return "etag of the object has changed"
}

// BackendDown is returned for network errors
type BackendDown struct {
	Err string
}

	"net/http"
	"net/url"
	"strconv"
	"strings"
	"sync/atomic"
	"time"

	"github.com/minio/minio/internal/auth"
	objectlock "github.com/minio/minio/internal/bucket/object/lock"
	"github.com/minio/minio/internal/etag"
	"github.com/minio/minio/internal/hash"
	xhttp "github.com/minio/minio/internal/http"
	xjwt "github.com/minio/minio/internal/jwt"
	"github.com/minio/minio/internal/logger"
	"github.com/minio/minio/internal/mcontext"

	if err != nil {
		t.Error("Unexpected error: ", err)
	}

	v := redirectURL.Query()
	v.Add("bucket", info.Bucket)
	v.Add("key", info.Name)
	v.Add("etag", "\""+info.ETag+"\"")
	redirectURL.RawQuery = v.Encode()
	expectedLocation := redirectURL.String()

	// Check the new location url
	if rec.Header().Get("Location") != expectedLocation {

* `headers` - 🙆 🛃 🎚 🔌, 📖.
* `media_type` - 🎻 🤝 📻 🆎. 🚥 🔢, 📁 ⚖️ ➡ 🔜 ⚙️ 🔑 📻 🆎.
* `filename` - 🚥 ⚒, 👉 🔜 🔌 📨 `Content-Disposition`.

📁 📨 🔜 🔌 ☑ `Content-Length`, `Last-Modified` & `ETag` 🎚.

{* ../../docs_src/custom_response/tutorial009.py hl[2,10] *}

👆 💪 ⚙️ `response_class` 🔢:

{* ../../docs_src/custom_response/tutorial009b.py hl[2,8,10] *}